Add Moose package

CPAN/Moose/Exception/AttributeMustBeAnClassMOPMixinAttributeCoreOrSubclass.pm

@@ -0,0 +1,19 @@
+package Moose::Exception::AttributeMustBeAnClassMOPMixinAttributeCoreOrSubclass;
+our $VERSION = '2.2207';
+
+use Moose;
+extends 'Moose::Exception';
+with 'Moose::Exception::Role::Class';
+
+has 'attribute' => (
+    is       => 'ro',
+    isa      => 'Any',
+    required => 1
+);
+
+sub _build_message {
+    "Your attribute must be an instance of Class::MOP::Mixin::AttributeCore (or a subclass)";
+}
+
+__PACKAGE__->meta->make_immutable;
+1;